The MFB-1100CH from Marki Microwave is a Band Pass Filter with Frequency 9 to 13 GHz, Center Frequency 11000 MHz, Insertion Loss 1.42 to 3 dB, Upper Rejection 20 to 30 dB, Lower Rejection 40 to 50 dB. Tags: Die, MMIC Filter. More details for MFB-1100CH can be seen below.